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Finding the Fourth Proportional to 308,912.13, 426,172.05 and 187,956.45

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Solution

The fourth proportional to 308,912.13, 426,172.05 and 187,956.45 is: 259,302.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,912.13 : 426,172.05 = 187,956.45 : x
  2. Step 2: Convert to fraction form
    308,912.13/426,172.05 = 187,956.45/x
  3. Step 3: Cross multiply
    308,912.13x = 426,172.05 × 187,956.45
  4. Step 4: Simplify right side
    308,912.13x = 80,101,785,607.22
  5. Step 5: Solve for x
    x = 80,101,785,607.22/308,912.13
  6. Step 6: Final answer
    x = 259,302.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.